Submillimeter Polarimetry of Molecular Clouds from Mauna Kea

Details Submillimeter Polarimetry of Molecular Clouds from Mauna Kea Submillimeter Polarimetry of Molecular Clouds from Mauna Kea

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21348603v&link_type=abstract

American Astronomical Society, AAS Meeting #213, #486.03; Bulletin of the American Astronomical Society, Vol. 41, p.459

Astronomy and Astrophysics

Astronomy

Scientific paper

Polarization maps of Galactic clouds at multiple far-infrared and submillimeter wavelengths have been used to study changing magnetic field structure with cloud depth, as well as put limits on grain shape, temperature, emissivity, and alignment efficiency. To date, few detailed studies have been carried out on individual clouds at multiple wavelengths. However, the Hertz polarimeter operating at 350 micron from the Caltech Submillimeter Observatory (CSO), and the SCUBA polarimeter operating at 850 micron from the James Clerk Maxwell Telescope (JCMT), have now generated dozens of maps of polarized dust emission from Galactic clouds. Both instrument teams have recently finished self-consistent re-analyses of their entire data sets. The Hertz archive (Dotson et al.) contains some 60 maps including Galactic clouds, proto-stellar objects, and galaxies. The SCUBA archive (Matthews et al.) contains about 90 maps of similar objects. We identify 15 clouds which these two data sets have in common and compare the polarization amplitudes and position angles at the two wavelengths. This more than triples the number of clouds at which direct comparisons have been made at 350 and 850 microns.
The CSO is supported by the U.S. National Science Foundation (NSF; AST 05-40882). Work with the Hertz polarimeter has been supported by NSF (AST 05-05124) and NASA (NGT 5-63). The JCMT is supported by the Science and Technology Facilities Council, the National Research Council of Canada, and the Netherlands Organisation for Scientific Research. SCUBA data analysis used the facilities of the Canadian Astronomy Data Centre operated by the National Research Council of Canada with the support of the Canadian Space Agency.

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